A Robust Flexible Electrochemical Gas Sensor Using Room Temperature Ionic Liquid

This paper introduces a robust electrochemical gas sensor featuring room temperature ionic liquid (RTIL) as electrolyte and porous polytetrafluoroethylene as a flexible substrate. Using a planar-electrodes-on-permeable-membrane structure, a flexible RTIL sensor with 9.6 mm2 sensing area is microfabricated. The sensor's response to oxygen is measured, achieving sensitivity of 0.48 μA/%O2, a linearity of 0.997 R2 in range of 0%-21% O2, and limit of detection of 0.08% O2. The reported sensor structure and fabrication process enable realization of sensor arrays for multi-gas monitoring in a low power, miniaturized, and wearable system platform.

[1]  Andrew J. Mason,et al.  Fabrication of a miniaturized room temperature ionic liquid gas sensor for human health and safety monitoring , 2012, 2012 IEEE Biomedical Circuits and Systems Conference (BioCAS).

[2]  N. Dossi,et al.  An oxygen amperometric gas sensor based on its electrocatalytic reduction in room temperature ionic liquids , 2012 .

[3]  N. Dossi,et al.  A Membrane Free Amperometric Gas Sensor Based on Room Temperature Ionic Liquids for the Selective Monitoring of NOx , 2012 .

[4]  Shengshui Hu,et al.  Inkjet printing of nanoporous gold electrode arrays on cellulose membranes for high-sensitive paper-like electrochemical oxygen sensors using ionic liquid electrolytes. , 2012, Analytical chemistry.

[5]  Emanuel Carrilho,et al.  An electrochemical gas sensor based on paper supported room temperature ionic liquids. , 2012, Lab on a chip.

[6]  Xiangqun Zeng,et al.  Ionic liquids as electrolytes for the development of a robust amperometric oxygen sensor. , 2011, Analytical chemistry.

[7]  Jinhuai Liu,et al.  Toward Membrane-Free Amperometric Gas Sensors: An Ionic Liquid–Nanoparticle Composite Approach , 2011 .

[8]  Mercedes Crego-Calama,et al.  Electrochemical sensing of ethylene employing a thin ionic-liquid layer. , 2011, Analytical chemistry.

[9]  J. Reiter,et al.  Ionic liquid―polymer electrolyte for amperometric solid-state NO2 sensor , 2011 .

[10]  Chang Ming Li,et al.  Highly Sensitive Nitric Oxide Sensing Using Three‐Dimensional Graphene/Ionic Liquid Nanocomposite , 2011 .

[11]  Arjang Hassibi,et al.  A CMOS Electrochemical Impedance Spectroscopy (EIS) Biosensor Array , 2010, IEEE Transactions on Biomedical Circuits and Systems.

[12]  R. Compton,et al.  (Invited) Amperometric Gas Detection Using Room Temperature Ionic Liquid Solvents , 2010 .

[13]  Richard G Compton,et al.  Toward membrane-free amperometric gas sensors: a microelectrode array approach. , 2010, Analytical chemistry.

[14]  Sachin R. Jadhav,et al.  Compact Low-Power Impedance-to-Digital Converter for Sensor Array Microsystems , 2009, IEEE Journal of Solid-State Circuits.

[15]  K.L. Shepard,et al.  Active CMOS Sensor Array for Electrochemical Biomolecular Detection , 2008, IEEE Journal of Solid-State Circuits.

[16]  Richard G. Compton,et al.  The Electrochemical Reduction of Hydrogen Sulfide on Platinum in Several Room Temperature Ionic Liquids , 2008 .

[17]  Shangjr Gwo,et al.  Quantitative surface acoustic wave detection based on colloidal gold nanoparticles and their bioconjugates. , 2008, Analytical chemistry.

[18]  J. Stetter,et al.  Amperometric gas sensors--a review. , 2008, Chemical reviews.

[19]  Craig E. Banks,et al.  Electrochemical ammonia gas sensing in nonaqueous systems: A comparison of propylene carbonate with room temperature ionic liquids , 2007 .

[20]  N. Dossi,et al.  An Ionic-Liquid Based Probe for the Sequential Preconcentration from Headspace and Direct Voltammetric Detection of Phenols in Wastewaters , 2007 .

[21]  Sheikh A. Akbar,et al.  Ceramics for chemical sensing , 2003 .

[22]  Marion Wienecke,et al.  PTFE membrane electrodes with increased sensitivity for gas sensor applications , 2003 .

[23]  泰伦斯・J・莫莱.  Electrochemical gas sensor , 2002 .

[24]  M. Hitchman,et al.  Thin sputtered platinum films on porous membranes as working electrodes in gas sensors , 1998 .

[25]  K. Ihokura,et al.  The tin dioxide gas sensor , 1993 .

[26]  Xiangqun Zeng,et al.  Ionic liquid high temperature gas sensors. , 2005, Chemical communications.

[27]  Rong Wang,et al.  A Novel Amperometric O2 Gas Sensor Based on Supported Room‐Temperature Ionic Liquid Porous Polyethylene Membrane‐Coated Electrodes , 2004 .